build(rechner): exact expression engine, keypad, scientific panel, history, memory; README

Co-Authored-By: Claude Opus 5.5 <[email protected]>
2026-10-17 16:02:11 +02:00
parent 7ef64324fb
commit 5027fbcd85
40 changed files with 1899 additions and 30 deletions
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+# Build log: Rechner
+
+App in `rechner/`. Engine unit tests: 12 suites of cases (exact decimals, percent rules, powers, implicit multiplication, trig incl. exact angles, logs, factorial, errors, lenient input). Screenshots via Roborazzi → `replica/rechner/clone-screens/`.
+
+| ID | date | status | missing | notes |
+| --- | --- | --- | --- | --- |
+| S01 Calculator | 2026-10-17 | done | – | verified on device: 12+34 live preview 46, = makes 46 the expression; display grows to meet the keypad |
+| S02 Scientific | 2026-10-17 | done | – | verified on device: Rad, cos(π) → −1 |
+| S03 History | 2026-10-17 | done | – | verified on device: pull down shows "Heute" group and the current expression |
+| S04 Context menu | 2026-10-17 | done | cut | copy, paste, MS, MR |
+| S05 Settings | 2026-10-17 | done | – | theme and clear history in the overflow menu |
+
+Not done: landscape layout; scrolling through all digits of very long results.
@@ -1,29 +1,29 @@
-feature,area,priority,original,clone,notes
-Basic arithmetic + − × ÷,core,must,yes,no,
-Live result preview while typing,core,must,yes,no,
-Equals makes the result the new expression,core,must,yes,no,
-Parentheses smart toggle key,core,must,yes,no,
-Percent,core,must,yes,no,
-Backspace and long-press to clear,core,must,yes,no,
-AC clears,core,must,yes,no,
-Exact arithmetic (no floating point errors),core,must,yes,no,BigDecimal/rational
-Errors shown (division by zero domain errors),core,must,yes,no,
-Auto-shrinking display for long input,display,must,yes,no,
-Scientific row √ π ^ !,science,must,yes,no,
-Expanded panel sin cos tan ln log e,science,must,yes,no,
-Deg/Rad switch,science,must,yes,no,
-Inv swaps to inverse functions,science,must,yes,no,
-Implicit multiplication (2π 3(4)),core,should,yes,no,
-History grouped by day,history,must,yes,no,
-Tap a history entry to reuse,history,must,yes,no,
-Clear history,history,should,yes,no,
-Pull down the display to open history,history,should,yes,no,
-Copy result / paste into expression,clipboard,must,yes,no,
-Memory store and recall (MS MR),clipboard,should,yes,no,
-Big numbers like 100! with scrolling,core,should,yes,no,
-Locale decimal separator,display,should,yes,no,comma in German
-Expressive keys with press morph,design,must,yes,no,
-Dynamic colour (wallpaper) and dark mode,design,must,yes,no,
-Haptic key feedback,design,should,yes,no,
-Tablet / landscape layout with all functions,layout,could,yes,no,
-Feedback and help,other,could,yes,skip,Google service
+feature,area,priority,original,clone,notes
+Basic arithmetic + − × ÷,core,must,yes,yes,
+Live result preview while typing,core,must,yes,yes,
+Equals makes the result the new expression,core,must,yes,yes,
+Parentheses smart toggle key,core,must,yes,yes,
+Percent,core,must,yes,yes,
+Backspace and long-press to clear,core,must,yes,yes,
+AC clears,core,must,yes,yes,
+Exact arithmetic (no floating point errors),core,must,yes,yes,BigDecimal/rational
+Errors shown (division by zero domain errors),core,must,yes,yes,
+Auto-shrinking display for long input,display,must,yes,yes,
+Scientific row √ π ^ !,science,must,yes,yes,
+Expanded panel sin cos tan ln log e,science,must,yes,yes,
+Deg/Rad switch,science,must,yes,yes,
+Inv swaps to inverse functions,science,must,yes,yes,
+Implicit multiplication (2π 3(4)),core,should,yes,yes,
+History grouped by day,history,must,yes,yes,
+Tap a history entry to reuse,history,must,yes,yes,
+Clear history,history,should,yes,yes,
+Pull down the display to open history,history,should,yes,yes,
+Copy result / paste into expression,clipboard,must,yes,yes,
+Memory store and recall (MS MR),clipboard,should,yes,yes,
+Big numbers like 100! with scrolling,core,should,yes,partial,"exact, shown scientific (9,33E157); full digits not scrollable yet"
+Locale decimal separator,display,should,yes,yes,comma in German
+Expressive keys with press morph,design,must,yes,yes,
+Dynamic colour (wallpaper) and dark mode,design,must,yes,yes,
+Haptic key feedback,design,should,yes,yes,
+Tablet / landscape layout with all functions,layout,could,yes,no,
+Feedback and help,other,could,yes,skip,Google service